WASHINGTON: Donald Trump will not be the US president because it’s a “serious job,” President Barack Obama said.

“I continue to believe that Mr. Trump will not be president. And the reason is because I have a lot of faith in the American people,” said Obama.

Meanwhile, Jeb Bush criticized Trump, Marco Rubio, and John Kasich Wednesday, dismissing them as ill-prepared as he fights for his political survival.

The former Florida governor said Rubio’s claim that Bush has no foreign policy experience is “a low blow.” Bush touts his two terms as governor and 30-plus years in the private sector, which included overseas trade missions.

He called Rubio, a US senator from Florida, “a back-bencher” and “a guy whose office has a hard time actually saying what his accomplishments are.”

National security is a key issue in the South Carolina primary. Bush is in a fight with Rubio, Ohio Gov. Kasich and Texas Sen. Ted Cruz for second place to Trump’s commanding lead in Saturday’s primary.

Separately, Vatican spokesman the Rev. Federico Lombardi said that Pope Francis is not an instrument of Mexico’s immigration policy and his concern about migrants is global, not just about the ones entering the US.

“The pope always talks about migration problems all around the world, of the duties we have to solve these problems in a humane manner, of hosting those who come from other countries in search of a life of dignity and peace.”

Lombardi’s comments came in response to Trump criticizing the pope’s plan to visit the border wall that separates Ciudad Juarez from El Paso, Texas, to put a focus on the plight of migrants.

Trump said in an interview with Fox that he doesn’t think the pope understands the danger to the US of an open border with Mexico. In Trump’s words: “I think Mexico got him to do it because they want to keep the border just the way it is. They’re making a fortune, and we’re losing.”